I am struggling with Mates in an assembly where I want the upper Probe rack to move forward and back to specified dimensions for show and tell.

If anyone can look at my assembly and help me out with Mates it would be appreciated.

The zip file is a Pack N Go with an image of the slide movement I am trying to achive.

When I try to move it now, things get a bit out of alignment.

FYI

The upper Rack design is proprietary (My design), and I am taking a leap of faith here.

Edit:

Zip files removed.

Following "Kevin Chandler" advice.